CVE-2026-64785

SwiftNIO HTTP/2 was missing validation on inbound HEADERS frames that let CR, LF, NUL, SP and other control characters reach an HTTP/1.1 backend through NIOHTTP2's HTTP/2-to-HTTP/1 codec, enabling HTTP request smuggling or response splitting. This vulnerability is addressed in swift-nio-http2 version 1.45.0.

CVSS v3 5.3 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/apple/swift-nio-http2/security/advisories/GHSA-q3g2-m552-3r9c	Vendor Advisory Patch

Configurations

Configuration 1 (hide)

cpe:2.3:a:apple:swiftnio_http\/2:*:*:*:*:*:swift:*:*

History

24 Oct 2026, 13:10

Type	Values Removed	Values Added
Summary		(es) SwiftNIO HTTP/2 carecía de validación en los marcos HEADERS entrantes, lo que permitía que CR, LF, NUL, SP y otros caracteres de control alcanzaran un backend HTTP/1.1 a través del codec de HTTP/2 a HTTP/1 de NIOHTTP2, posibilitando el contrabando de solicitudes HTTP o la división de respuestas. Esta vulnerabilidad se ha solucionado en la versión 1.45.0 de swift-nio-http2.

Information

Published : 2026-07-23 20:17

Updated : 2026-10-24 13:10

NVD link : CVE-2026-64785

Mitre link : CVE-2026-64785

CVE.ORG link : CVE-2026-64785

JSON object : View

Products Affected

apple

swiftnio_http\/2

CWE

CWE-444

Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

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